# str = "day day up"
# for i in range(len(str)):
#     print(str[i], end=" ")

# list1 = []
# # list1[0] = 1
# # list1[1] = 2
# list1.append(3)
# list1.append(4)
# list1.append(5)
# print(list1)


# list3 = list();
# list3.append(1)
# list3.append(2)
# list3.append(3)
# print(list3)

list2 = [1, 2, 3]
for i in list2:
    print(i)
list2.insert(1,10)
print(list2)
list2.extend([11,12])
print(list2)
list2.sort(reverse=True)  # 默认升序 降序 reverse=True
print('------------')
print(list2)

list3 = sorted(list2)
print(list2)
print(list3)
del list3
print('++++++++++++++++++++')
# print(list3) #name 'list3' is not defined


list4 = [1,3,5,7,9]

#1-10
list5 = [i**2 for i in range(1,10) if i%2 !=0]
print(list5)

str = ('1111',)
print(type(str))
